CN103952214A - Thermal conductive transformer oil containing nanometer aluminum oxide - Google Patents
Thermal conductive transformer oil containing nanometer aluminum oxide Download PDFInfo
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- CN103952214A CN103952214A CN201410154235.6A CN201410154235A CN103952214A CN 103952214 A CN103952214 A CN 103952214A CN 201410154235 A CN201410154235 A CN 201410154235A CN 103952214 A CN103952214 A CN 103952214A
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Abstract
The invention relates to transformer oil. The transformer oil comprises base oil and 0.01-0.05wt% of modified nanometer aluminum oxide measured on the basis of the base oil. The base oil comprises 60-70wt% of refined vegetable oil and 30-40wt% of straight-chain alkanes, wherein the straight-chain alkanes are obtained by deep hydrogenation of the vegetable oil. The transformer oil disclosed by the invention solves the problems of worse thermal conductivity and poor oxidation resistance of transformer oil prepared from vegetable oil. By introducing straight-chain alkanes obtained by deep hydrogenation of vegetable oil, the nanometer materials in the transformer oil disclosed by the invention have better dispersion stability and the oxidation resistance of the transformer oil is also further improved.
Description
Technical field
The present invention relates to transformer oil technical field, concrete is a kind of transformer oil that comprises nano material and vegetables oil.
Background technology
Transformer can be divided into dry type transformer, oil-filled transformer and inflatable transformer according to insulation mode.Oil-filled transformer compact construction, good cooling results, under similar effect condition, product-specific investments is lower, and performance is more reliable.Transformer oil has two effects, the first between transformer winding, winding insulate between iron core and fuel tank, it two is to be subject to thermogenesis convection current, thereby transformer core and winding are played to cooling effect.
The thermal conductivity of traditional transformer oil is less, in order to meet heat radiation requirement, needs larger heat-dissipating space, is unfavorable for the miniaturization of transformer, and secondly also needing to install additional cooling apparatus, to carry out forced convection cooling, thereby the manufacturing cost of whole transformer is increased.Transformer after operation for some time tends to because transformer oil water absorbability increases aging, thereby cause decomposition, the oxidation of dielectric, make the integral insulation degradation of transformer, cooling effect, thermolysis and arc extinguishing effect weaken greatly, transformer oil after aging even can produce greasy filth and stop up transformer oil circulation passage, impact heat radiation.Therefore in order to adapt to the developing direction of the large capacity of power transformer, voltage levels and miniaturization, improve the insulation characterisitic of traditional transformer oil long-time running, research insulating property are better, and heat aging is can better transformer oil extremely urgent.
At present, nanotechnology is widely used in the world to multiple industrial technologies field, and the concept of nano-fluid has been proposed, and so-called nano-fluid refers to that nanoparticulate dispersed forms stable suspension in base fluid, the thermal conductivity of the thermal conductivity ratio base fluid in nano-fluid improves significantly.Therefore nano material being incorporated in transformer oil is a new research direction, and existing research shows, nano modification can not only improve the heat exchanger effectiveness of transformer oil, can also improve the insulating property of transformer.But there is nano material suspension stability deficiency in nano modification transformer oil at present, and nano material is carried out after surface modification, and surface-modifying agent can reduce the problem of the insulating property of transformer oil.
Vegetables oil carries out as the research of transformer oil and the research of mineral oil simultaneously, in early days because vegetables oil condensation point is high, viscosity is large, therefore only as the soaker of electrical condenser.Since the nineties in last century, vegetables oil is as the liquid insulating medium attention of having got back.Vegetables oil can be degradable, and flash-point is higher than 300 DEG C, and electrical insulation properties also can meet the requirement of transformer completely simultaneously.But because the kinematic viscosity of vegetables oil is higher, therefore need the radiator structure of transformer to be optimized.
Yet there are no at present report both at home and abroad simultaneously using nano material and vegetables oil simultaneously as the report of transformer oil component.
Summary of the invention
The invention vegetables oil basis oil is combined with nano material, preparation cost is cheap, and degradability is good, has again the novel transformer oil of good electrical insulation properties simultaneously.This transformer oil has solved the problem that transformer oil thermal conductivity is poor, oxidation-resistance is not good prepared by vegetables oil, make the dispersion stabilization of nano material in transformer oil better by introducing the straight-chain paraffin obtaining by deep hydrogenation vegetables oil, also further improved the oxidation-resistance of transformer oil simultaneously.
Nano aluminium oxide, because surface is with electric charge, is dispersed in liquid and easily reunites, and causes its stability not good, and therefore generally need to carry out surface modification to it can use.The present invention comforms in many nano-material surfaces improving agent and optimizes the surface improver of sorbester p17 as nano aluminium oxide, sorbester p17 and nano aluminium oxide surface are with bridge work coordination mode bonding, form good decorative layer on nano aluminium oxide surface, sorbester p17 molecule is tight at nano aluminium oxide surface alignment, and dispersiveness and the stability of nano aluminium oxide particulate in transformer oil is significantly improved.
Technical problem to be solved by this invention is to provide a kind of transformer oil, has good electrical insulation properties and heat conductivility concurrently simultaneously.The nano alumina material adding in transformer oil, because aluminum oxide itself has higher insulating property, so can further reduce the insulating property of transformer oil, simultaneously due to alumina surface has been carried out to modification, the dispersiveness of nano alumina material is greatly improved, and the transformer oil of preparation can ensure stable degree of scatter during normal service life.
The transformer oil that the present invention proposes, it comprises base oil and the nano aluminium oxide in the 0.01-0.05wt% of base oil.
Described base oil weight percent composition is: refined vegetable oil 60-70%, straight-chain paraffin 30-40%.
Described refined vegetable oil is that common vegetables oil is through alkali cleaning, dehydration, esterification neutralizing treatment, to remove the product obtaining after free fatty acids in grease and moisture.
Described modified nano-alumina is that nano aluminium oxide is dispersed in cyclohexane solvent, then adds the sorbester p17 identical with quality of alumina, uses after ultrasonication 1-2h, centrifugation goes out modified aluminas, re-use dehydrated alcohol and clean, dry, obtain modified nano-alumina.
The particle shape of described nano aluminium oxide is spherical.
The average particulate diameter of described nano aluminium oxide is 1-20 nanometer, and further preferable particle size is 5-15 nanometer.
Described transformer oil further comprises oxidation inhibitor and metal passivator.
Described oxidation inhibitor is in 2,6-tri-tert-4-methylphenol, 2,6 di t butyl phenol, alkylbenzene-αnaphthylamine, tea-polyphenol one or more.
Described metal passivator also further comprises one or more in thiadiazoles and derivative thereof, benzotriazole and its derivative.
Described straight-chain paraffin is to carry out Deep Hydrotreating taking vegetables oil as raw material, and the processing condition of processing are: temperature of reaction 350-450 DEG C, pressure 5-15MPa, air speed 1-10h
-1, the catalyzer of use is industrialized hydrotreating catalyst.
Described hydrotreating catalyst contains heat-resistant inorganic oxide and loads on the hydrogenation activity component on this carrier, and described hydrogenation activity component is cobalt and/or nickel and molybdenum and/or tungsten; Taking the weight of catalyzer as benchmark, in oxide compound, the content of molybdenum and/or tungsten is 5-30wt%, and the content of cobalt and/or nickel is 1-10wt%.Described heat-resistant inorganic oxide carrier is preferably one or more mixtures in aluminum oxide, silicon oxide, titanium oxide, zirconium white and molecular sieve.
Described vegetables oil comprises rapeseed oil, sunflower oil, soybean oil, sweet oil, plam oil, peanut oil, Semen Maydis oil, cottonseed wet goods, because the carbochain saturation ratio of oleic acid is higher, therefore its oxidation-resistance is better, the high plant of the preferred oil of refined vegetable oil described in the present invention acid content, as rapeseed oil and peanut oil.
Per-cent described in the present invention or umber are all to calculate in mass.
Embodiment
Below will be described in detail the preferred embodiments of the present invention.In embodiment, all represent addition with weight part.
Embodiment 1
The modified nano-alumina of 0.05 part is joined in 70 parts of refined vegetable oils, add again the straight-chain paraffin of 30 parts, ultrasonic wave is disperseed 2h, add 0.3 part 2,6-DI-tert-butylphenol compounds and 0.2 part of tea-polyphenol oxidation inhibitor, 0.5 part of benzotriazole, then pass through ultrasonic wave dispersion treatment 1h, obtain transformer oil product.
Embodiment 2
The nano aluminium oxide of 0.05 part is joined in 60 parts of refined vegetable oils, add again the straight-chain paraffin of 40 parts, ultrasonic wave is disperseed 2h, add 0.3 part 2,6-DI-tert-butylphenol compounds and 0.2 part of alkylbenzene-αnaphthylamine oxidation inhibitor, 0.5 part of benzotriazole, 0.1 part of thiadiazoles, pass through again ultrasonic wave dispersion treatment 1h, obtain transformer oil product.
Transformer oil main performance index prepared by the present invention
| Project | Environment protection type transformer | GB2536-90(DB-25) | Test method |
| Outward appearance | Light yellow transparent liquid | Transparent, nothing precipitates and suspended substance | GB511-77 |
| 40 DEG C of kinematic viscosity, mm2/s≤ | 8.5 | 9.6 | GB265-75 |
| Condensation point, DEG C≤ | -20 | -25 | GB510-77 |
| Flash-point, DEG C >= | 230 | 140 | GB261-77 |
| Acid number, mgKOH/g≤ | 0.02 | 0.03 | GB264-77 |
| 90 DEG C of dielectric loss tangents, %≤ | 0.3 | 0.5 | SY2654-76 |
| Voltage breakdown, KV/2.5mm >= | 70 | 35 | GB507-77 |
Claims (9)
1. a transformer oil, it comprises base oil and the modified nano-alumina in base oil 0.01-0.05wt%, it is characterized in that: base oil is made up of refined vegetable oil and the 30-40wt% straight-chain paraffin of 60-70wt%, described straight-chain paraffin is the product that vegetables oil obtains through Deep Hydrotreating.
2. transformer oil as claimed in claim 1, is characterized in that described modified nano-alumina is spherical, and median size is 1-20 nanometer.
3. transformer oil as claimed in claim 1, is characterized in that described straight-chain paraffin is to carry out Deep Hydrotreating taking vegetables oil as raw material, and the processing condition of Deep Hydrotreating are: temperature of reaction 350-450 DEG C, pressure 5-15MPa, air speed 1-10h
-1, the catalyzer of use is industrialized hydrotreating catalyst.
4. transformer oil as claimed in claim 3, is characterized in that described hydrotreating catalyst contains heat-resistant inorganic oxide and loads on the hydrogenation activity component on this carrier, and described hydrogenation activity component is cobalt and/or nickel and molybdenum and/or tungsten; Taking the weight of catalyzer as benchmark, in oxide compound, the content of molybdenum and/or tungsten is 5-30 % by weight, and the content of cobalt and/or nickel is 1-10 % by weight, and described heat-resistant inorganic oxide carrier is preferably one or more mixtures in aluminum oxide, silicon oxide, titanium oxide, zirconium white and molecular sieve.
5. transformer oil as claimed in claim 1, is characterized in that described refined vegetable oil is that common vegetables oil is through alkali cleaning, dehydration, esterification neutralizing treatment, to remove the product obtaining after free fatty acids in grease and moisture.
6. transformer oil as claimed in claim 1, is characterized in that described transformer oil further comprises oxidation inhibitor and metal passivator.
7. transformer oil as claimed in claim 5, it is characterized in that described oxidation inhibitor is in 2,6-tri-tert-4-methylphenol, 2,6 di t butyl phenol, alkylbenzene-αnaphthylamine, tea-polyphenol one or more.
8. transformer oil as claimed in claim 5, is characterized in that described metal passivator is one or more in thiadiazoles and derivative thereof, benzotriazole and its derivative.
9. transformer oil as claimed in claim 1, it is characterized in that described modified nano-alumina is that nano aluminium oxide is dispersed in cyclohexane solvent, then add the sorbester p17 identical with quality of alumina, use after ultrasonication 1-2h, centrifugation goes out the nano alumina particles of surface modification, re-use dehydrated alcohol and clean, dry, obtain modified nano-alumina.
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| CN201410154235.6A CN103952214B (en) | 2014-04-16 | 2014-04-16 | A kind of heat conducting nano aluminum oxide transformer oil |
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| CN201410154235.6A CN103952214B (en) | 2014-04-16 | 2014-04-16 | A kind of heat conducting nano aluminum oxide transformer oil |
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| CN103952214B CN103952214B (en) | 2016-01-20 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357186A (en) * | 2014-10-15 | 2015-02-18 | 安徽蓝翔电器成套设备有限公司 | Transformer oil and preparation method thereof |
| CN105038927A (en) * | 2015-07-06 | 2015-11-11 | 天门市天宝化工科技有限公司 | Composite modified nano particle transformer oil, and preparation method thereof |
| CN105505544A (en) * | 2016-01-29 | 2016-04-20 | 郝福 | Transformer oil with colloid inhibition function |
| CN105602690A (en) * | 2016-01-29 | 2016-05-25 | 郝福 | Transformer oil with gas inhibition function |
| CN105623784A (en) * | 2014-10-27 | 2016-06-01 | 国家电网公司 | Environmental protection nanometer heat conduction transformer oil and preparation method thereof |
| CN105754694A (en) * | 2016-04-26 | 2016-07-13 | 苏州思创源博电子科技有限公司 | Preparation method of insulating transformer oil |
| CN106544143A (en) * | 2016-11-19 | 2017-03-29 | 国网河南省电力公司周口供电公司 | A kind of nano modification transformer oil and preparation method thereof |
| CN106753689A (en) * | 2016-11-25 | 2017-05-31 | 国网山东省电力公司荣成市供电公司 | The method for improving oxidation stability of transformer oil |
| CN106867638A (en) * | 2017-04-01 | 2017-06-20 | 江苏奥克化学有限公司 | A kind of transformer oil composition, transformer oil and preparation method thereof |
| CN108504427A (en) * | 2018-05-15 | 2018-09-07 | 国网山东省电力公司荣成市供电公司 | A kind of nanometer particle-modified transformer oil and preparation method thereof |
| CN108715767A (en) * | 2018-05-14 | 2018-10-30 | 国网山东省电力公司荣成市供电公司 | A kind of heat conduction transformer oil and preparation method thereof |
| CN110643416A (en) * | 2019-09-27 | 2020-01-03 | 国网四川省电力公司电力科学研究院 | Modified insulating oil, preparation method and application thereof |
| CN111961515A (en) * | 2020-08-27 | 2020-11-20 | 武汉理工大学 | Realization of Al2O3Method for long-time dispersion stabilization of nano particles in lubricating oil |
| CN112126255A (en) * | 2019-06-09 | 2020-12-25 | 中国科学院宁波材料技术与工程研究所 | Preparation method of ultrafast self-repairing material and ultrafast self-repairing film layer on surface of substrate |
| CN112210425A (en) * | 2020-09-02 | 2021-01-12 | 江苏双江能源科技股份有限公司 | Natural ester transformer oil and preparation method thereof |
| CN113528217A (en) * | 2021-06-09 | 2021-10-22 | 广西大学 | Nano SiC-modified high-thermal-conductivity corn insulating oil and preparation method thereof |
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| CN101538500A (en) * | 2009-04-28 | 2009-09-23 | 重庆大学 | Preparation method of insulating oil taking vegetable oil as raw material |
| CN101901637A (en) * | 2010-07-29 | 2010-12-01 | 重庆大学 | Composite of vegetable insulating oil and modified nano powder and application and preparation method thereof |
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| CN101538500A (en) * | 2009-04-28 | 2009-09-23 | 重庆大学 | Preparation method of insulating oil taking vegetable oil as raw material |
| CN101901637A (en) * | 2010-07-29 | 2010-12-01 | 重庆大学 | Composite of vegetable insulating oil and modified nano powder and application and preparation method thereof |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357186A (en) * | 2014-10-15 | 2015-02-18 | 安徽蓝翔电器成套设备有限公司 | Transformer oil and preparation method thereof |
| CN105623784A (en) * | 2014-10-27 | 2016-06-01 | 国家电网公司 | Environmental protection nanometer heat conduction transformer oil and preparation method thereof |
| CN105038927A (en) * | 2015-07-06 | 2015-11-11 | 天门市天宝化工科技有限公司 | Composite modified nano particle transformer oil, and preparation method thereof |
| CN105505544B (en) * | 2016-01-29 | 2021-01-15 | 滨州市坤厚工贸有限责任公司 | Transformer oil with colloid inhibition function |
| CN105505544A (en) * | 2016-01-29 | 2016-04-20 | 郝福 | Transformer oil with colloid inhibition function |
| CN105602690A (en) * | 2016-01-29 | 2016-05-25 | 郝福 | Transformer oil with gas inhibition function |
| CN105602690B (en) * | 2016-01-29 | 2021-12-10 | 青岛哇咔咔科技有限公司 | Transformer oil with gas inhibition function |
| CN105754694A (en) * | 2016-04-26 | 2016-07-13 | 苏州思创源博电子科技有限公司 | Preparation method of insulating transformer oil |
| CN106544143A (en) * | 2016-11-19 | 2017-03-29 | 国网河南省电力公司周口供电公司 | A kind of nano modification transformer oil and preparation method thereof |
| CN106544143B (en) * | 2016-11-19 | 2019-03-19 | 国网河南省电力公司周口供电公司 | A kind of nano modification transformer oil and preparation method thereof |
| CN106753689A (en) * | 2016-11-25 | 2017-05-31 | 国网山东省电力公司荣成市供电公司 | The method for improving oxidation stability of transformer oil |
| CN106867638A (en) * | 2017-04-01 | 2017-06-20 | 江苏奥克化学有限公司 | A kind of transformer oil composition, transformer oil and preparation method thereof |
| CN108715767A (en) * | 2018-05-14 | 2018-10-30 | 国网山东省电力公司荣成市供电公司 | A kind of heat conduction transformer oil and preparation method thereof |
| CN108715767B (en) * | 2018-05-14 | 2021-06-22 | 国网山东省电力公司荣成市供电公司 | Heat-conducting transformer oil and preparation method thereof |
| CN108504427B (en) * | 2018-05-15 | 2021-04-09 | 国网山东省电力公司荣成市供电公司 | Nanoparticle modified transformer oil and preparation method thereof |
| CN108504427A (en) * | 2018-05-15 | 2018-09-07 | 国网山东省电力公司荣成市供电公司 | A kind of nanometer particle-modified transformer oil and preparation method thereof |
| CN112126255A (en) * | 2019-06-09 | 2020-12-25 | 中国科学院宁波材料技术与工程研究所 | Preparation method of ultrafast self-repairing material and ultrafast self-repairing film layer on surface of substrate |
| CN110643416A (en) * | 2019-09-27 | 2020-01-03 | 国网四川省电力公司电力科学研究院 | Modified insulating oil, preparation method and application thereof |
| CN111961515A (en) * | 2020-08-27 | 2020-11-20 | 武汉理工大学 | Realization of Al2O3Method for long-time dispersion stabilization of nano particles in lubricating oil |
| CN112210425A (en) * | 2020-09-02 | 2021-01-12 | 江苏双江能源科技股份有限公司 | Natural ester transformer oil and preparation method thereof |
| CN113528217A (en) * | 2021-06-09 | 2021-10-22 | 广西大学 | Nano SiC-modified high-thermal-conductivity corn insulating oil and preparation method thereof |
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| CN103952214B (en) | 2016-01-20 |
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Effective date of registration: 20160614 Address after: 224000, Jiangsu, Yancheng City province salt District salt long street Liuzhou Road Patentee after: Jiangsu Hasen Electric CO., LTD. Address before: 224000, Jiangsu, Yancheng City province salt District long salt street, long road (Huasheng Transformer Manufacturing Co., Ltd.) Patentee before: JIANGSU BEIER SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD. |